GLMixer Code

BugFix: alpha fading of session switcher could be sensitive to texture
previously bound.

BugFix: rendering source update of ffglplugin on change of texture index
(change of mode or after initial creation)

Re-implementation of single instance mechanism and re-implementation of
log file management. Now correctly detecting crash logs upon application
start.

compilation fix

Implementation of preference for fading duration of active/disable
rendering.

bugfix: display default cursor fading in timeline

Improved video synch to pervent backward jumps on some mp4 encoded time
stamps.

BugFix: restoring loading of groups in mixing view, and fixing limbo size
bug correctly.

BugFix saving enable status of freeframe plugins

Finishing implementation of lumakey (needs to update version of
preferences)